Question

The purpose of electron gun in a cathode ray tube is :

• A. to change the electric signal to the visual signal
• B. to give out a fine energetic beam of electrons
• C. to deflect the electron beam
• D. to produce electrons

Answer 1

The correct option is B to give out a fine energetic beam of electrons

The purpose of electron gun in a cathode ray tube is to give out a fine energetic beam of electrons.
The electron gun starts with a small heater, which is a lot like the hot, bright filament of a regular light bulb. It heats a cathode, which emits a cloud of electrons. Two anodes turn the cloud into an electron beam.